In the Linux kernel, the following vulnerability has been resolved:
scsi: iscsi_tcp: Fix UAF during logout when accessing the shost ipaddress
Bug report and analysis from Ding Hui.
During iSCSI session logout, if another task accesses the shost ipaddress attr, we can get a KASAN UAF report like this:
[ 276.942144] BUG: KASAN: use-after-free in _raw_spin_lock_bh+0x78/0xe0 [ 276.942535] Write of size 4 at addr ffff8881053b45b8 by task cat/4088 [ 276.943511] CPU: 2 PID: 4088 Comm: cat Tainted: G E 6.1.0-rc8+ #3 [ 276.943997] Hardware name: VMware, Inc. VMware Virtual Platform/440BX Desktop Reference Platform, BIOS 6.00 11/12/2020 [ 276.944470] Call Trace: [ 276.944943] <TASK> [ 276.945397] dump_stack_lvl+0x34/0x48 [ 276.945887] print_address_description.constprop.0+0x86/0x1e7 [ 276.946421] print_report+0x36/0x4f [ 276.947358] kasan_report+0xad/0x130 [ 276.948234] kasan_check_range+0x35/0x1c0 [ 276.948674] _raw_spin_lock_bh+0x78/0xe0 [ 276.949989] iscsi_sw_tcp_host_get_param+0xad/0x2e0 [iscsi_tcp] [ 276.951765] show_host_param_ISCSI_HOST_PARAM_IPADDRESS+0xe9/0x130 [scsi_transport_iscsi] [ 276.952185] dev_attr_show+0x3f/0x80 [ 276.953005] sysfs_kf_seq_show+0x1fb/0x3e0 [ 276.953401] seq_read_iter+0x402/0x1020 [ 276.954260] vfs_read+0x532/0x7b0 [ 276.955113] ksys_read+0xed/0x1c0 [ 276.955952] do_syscall_64+0x38/0x90 [ 276.956347] entry_SYSCALL_64_after_hwframe+0x63/0xcd [ 276.956769] RIP: 0033:0x7f5d3a679222 [ 276.957161] Code: c0 e9 b2 fe ff ff 50 48 8d 3d 32 c0 0b 00 e8 a5 fe 01 00 0f 1f 44 00 00 f3 0f 1e fa 64 8b 04 25 18 00 00 00 85 c0 75 10 0f 05 <48> 3d 00 f0 ff ff 77 56 c3 0f 1f 44 00 00 48 83 ec 28 48 89 54 24 [ 276.958009] RSP: 002b:00007ffc864d16a8 EFLAGS: 00000246 ORIG_RAX: 0000000000000000 [ 276.958431] RAX: ffffffffffffffda RBX: 0000000000020000 RCX: 00007f5d3a679222 [ 276.958857] RDX: 0000000000020000 RSI: 00007f5d3a4fe000 RDI: 0000000000000003 [ 276.959281] RBP: 00007f5d3a4fe000 R08: 00000000ffffffff R09: 0000000000000000 [ 276.959682] R10: 0000000000000022 R11: 0000000000000246 R12: 0000000000020000 [ 276.960126] R13: 0000000000000003 R14: 0000000000000000 R15: 0000557a26dada58 [ 276.960536] </TASK> [ 276.961357] Allocated by task 2209: [ 276.961756] kasan_save_stack+0x1e/0x40 [ 276.962170] kasan_set_track+0x21/0x30 [ 276.962557] __kasan_kmalloc+0x7e/0x90 [ 276.962923] __kmalloc+0x5b/0x140 [ 276.963308] iscsi_alloc_session+0x28/0x840 [scsi_transport_iscsi] [ 276.963712] iscsi_session_setup+0xda/0xba0 [libiscsi] [ 276.964078] iscsi_sw_tcp_session_create+0x1fd/0x330 [iscsi_tcp] [ 276.964431] iscsi_if_create_session.isra.0+0x50/0x260 [scsi_transport_iscsi] [ 276.964793] iscsi_if_recv_msg+0xc5a/0x2660 [scsi_transport_iscsi] [ 276.965153] iscsi_if_rx+0x198/0x4b0 [scsi_transport_iscsi] [ 276.965546] netlink_unicast+0x4d5/0x7b0 [ 276.965905] netlink_sendmsg+0x78d/0xc30 [ 276.966236] sock_sendmsg+0xe5/0x120 [ 276.966576] ____sys_sendmsg+0x5fe/0x860 [ 276.966923] ___sys_sendmsg+0xe0/0x170 [ 276.967300] __sys_sendmsg+0xc8/0x170 [ 276.967666] do_syscall_64+0x38/0x90 [ 276.968028] entry_SYSCALL_64_after_hwframe+0x63/0xcd [ 276.968773] Freed by task 2209: [ 276.969111] kasan_save_stack+0x1e/0x40 [ 276.969449] kasan_set_track+0x21/0x30 [ 276.969789] kasan_save_free_info+0x2a/0x50 [ 276.970146] __kasan_slab_free+0x106/0x190 [ 276.970470] __kmem_cache_free+0x133/0x270 [ 276.970816] device_release+0x98/0x210 [ 276.971145] kobject_cleanup+0x101/0x360 [ 276.971462] iscsi_session_teardown+0x3fb/0x530 [libiscsi] [ 276.971775] iscsi_sw_tcp_session_destroy+0xd8/0x130 [iscsi_tcp] [ 276.972143] iscsi_if_recv_msg+0x1bf1/0x2660 [scsi_transport_iscsi] [ 276.972485] iscsi_if_rx+0x198/0x4b0 [scsi_transport_iscsi] [ 276.972808] netlink_unicast+0x4d5/0x7b0 [ 276.973201] netlink_sendmsg+0x78d/0xc30 [ 276.973544] sock_sendmsg+0xe5/0x120 [ 276.973864] ____sys_sendmsg+0x5fe/0x860 [ 276.974248] ___sys_ ---truncated---
CVSS Details
- CVSS 3.1 Base Score: 7.8
- CVSS 3.1 Vector: (CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H)
Covered by Rapid7
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Amazon Linux Ami 2 | — | Upgrade python-perf-debuginfoUpgrade perfUpgrade kernel-tools-debuginfoUpgrade kernel-livepatch-5.10.236-227.928Upgrade kernel-debuginfoUpgrade kernel-tools-develUpgrade perf-debuginfoUpgrade kernel-headersUpgrade kernel-develUpgrade kernel-toolsUpgrade bpftoolUpgrade python-perfUpgrade kernelUpgrade kernel-debuginfo-common-aarch64Upgrade kernel-debuginfo-common-x86_64Upgrade kernel-livepatch-4.14.355-276.639Upgrade bpftool-debuginfo | Apr 30, 2025 | Mar 27, 2025 |
| Amazon_linux | — | Upgrade kernel | May 22, 2025 | Mar 27, 2025 |
| Debian | — | Upgrade linux | Mar 31, 2025 | Mar 27, 2025 |
| Huawei Euleros 2_0_sp13 | — | Upgrade kernel-tools-libsUpgrade kernelUpgrade kernel-abi-stablelistsUpgrade python3-perfUpgrade kernel-toolsUpgrade bpftool | Jul 1, 2025 | Mar 27, 2025 |
| Redhat_linux | — | Upgrade kernelNo solution existsUpgrade kernel-rt | Jul 9, 2025 | Mar 27, 2025 |
| Ubuntu | — | Upgrade linux-image-genericUpgrade linux-image-generic-hwe-16.04Upgrade linux-image-oracle-4.15Upgrade linux-image-5.4.0-1152-gcp-fipsUpgrade linux-image-oracle-lts-20.04Upgrade linux-image-lowlatency-hwe-18.04Upgrade linux-image-lowlatency-5.4Upgrade linux-image-generic-lts-xenialUpgrade linux-image-kvm-5.4Upgrade linux-image-4.4.0-1147-kvmUpgrade linux-image-5.4.0-1148-oracleUpgrade linux-image-virtual-5.4Upgrade linux-image-5.4.0-1123-fipsUpgrade linux-image-generic-lpae-5.4Upgrade linux-image-aws-lts-18.04Upgrade linux-image-azure-5.4Upgrade linux-image-lowlatencyUpgrade linux-image-5.4.0-1154-azureUpgrade linux-image-generic-lts-quantalUpgrade linux-image-fipsUpgrade linux-image-xilinx-zynqmpUpgrade linux-image-aws-hweUpgrade linux-image-oemUpgrade linux-image-gkeUpgrade linux-image-ibmUpgrade linux-image-4.15.0-1145-oracleUpgrade linux-image-4.4.0-271-genericUpgrade linux-image-bluefieldUpgrade linux-image-4.15.0-1191-azureUpgrade linux-image-5.4.0-220-genericUpgrade linux-image-generic-lts-trustyUpgrade linux-image-virtual-hwe-16.04Upgrade linux-image-4.15.0-1176-gcpUpgrade linux-image-4.15.0-1166-kvmUpgrade linux-image-5.4.0-220-generic-lpaeUpgrade linux-image-gcp-fipsUpgrade linux-image-generic-lpaeUpgrade linux-image-ibm-lts-20.04Upgrade linux-image-4.4.0-1184-awsUpgrade linux-image-5.4.0-1108-bluefieldUpgrade linux-image-lowlatency-hwe-16.04Upgrade linux-image-oracleUpgrade linux-image-4.15.0-240-genericUpgrade linux-image-bluefield-5.4Upgrade linux-image-aws-4.15Upgrade linux-image-gcp-4.15Upgrade linux-image-aws-5.4Upgrade linux-image-4.15.0-2100-azure-fipsUpgrade linux-image-azure-lts-20.04Upgrade linux-image-xilinx-zynqmp-5.4Upgrade linux-image-aws-fipsUpgrade linux-image-gcp-fips-5.4Upgrade linux-image-5.4.0-1152-gcpUpgrade linux-image-5.4.0-1149-awsUpgrade linux-image-aws-fips-5.4Upgrade linux-image-5.4.0-1147-oracleUpgrade linux-image-snapdragon-hwe-18.04Upgrade linux-image-snapdragon-5.4Upgrade linux-image-gcp-fips-4.15Upgrade linux-image-generic-lts-raringUpgrade linux-image-oracle-5.4Upgrade linux-image-4.4.0-1116-fipsUpgrade linux-image-azure-4.15Upgrade linux-image-3.13.0-209-lowlatencyUpgrade linux-image-serverUpgrade linux-image-virtualUpgrade linux-image-aws-fips-4.15Upgrade linux-image-raspiUpgrade linux-image-azureUpgrade linux-image-awsUpgrade linux-image-virtual-lts-xenialUpgrade linux-image-5.4.0-1067-xilinx-zynqmpUpgrade linux-image-5.4.0-1095-ibmUpgrade linux-image-generic-lts-saucyUpgrade linux-image-azure-fips-5.4Upgrade linux-image-raspi-hwe-18.04Upgrade linux-image-5.4.0-1136-kvmUpgrade linux-image-ibm-5.4Upgrade linux-image-5.4.0-1155-azure-fipsUpgrade linux-image-lowlatency-lts-xenialUpgrade linux-image-virtual-hwe-18.04Upgrade linux-image-azure-lts-18.04Upgrade linux-image-gcp-lts-18.04Upgrade linux-image-4.15.0-1138-fipsUpgrade linux-image-raspi-5.4Upgrade linux-image-aws-lts-20.04Upgrade linux-image-4.15.0-240-lowlatencyUpgrade linux-image-gcp-lts-20.04Upgrade linux-image-raspi2Upgrade linux-image-5.4.0-220-lowlatencyUpgrade linux-image-3.13.0-209-genericUpgrade linux-image-5.4.0-1149-aws-fipsUpgrade linux-image-4.4.0-1146-awsUpgrade linux-image-oracle-lts-18.04Upgrade linux-image-4.15.0-1183-awsUpgrade linux-image-4.4.0-271-lowlatencyUpgrade linux-image-4.15.0-2121-aws-fipsUpgrade linux-image-gcp-5.4Upgrade linux-image-5.4.0-1132-raspiUpgrade linux-image-azure-fips-4.15Upgrade linux-image-kvmUpgrade linux-image-azure-fipsUpgrade linux-image-4.15.0-2084-gcp-fipsUpgrade linux-image-5.4.0-1053-iotUpgrade linux-image-gcpUpgrade linux-image-fips-5.4Upgrade linux-image-generic-hwe-18.04Upgrade linux-image-oem-osp1Upgrade linux-image-generic-5.4 | Apr 1, 2025 | Mar 27, 2025 |
| Vmware Photon_os | — | Use 'tdnf update' to upgrade all packages to the latest version. | Oct 10, 2025 | Mar 27, 2025 |
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